CN107240377B - Method and device for compensating visual angle chromatic aberration of liquid crystal display and liquid crystal display - Google Patents

Method and device for compensating visual angle chromatic aberration of liquid crystal display and liquid crystal display Download PDF

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CN107240377B
CN107240377B CN201611034305.XA CN201611034305A CN107240377B CN 107240377 B CN107240377 B CN 107240377B CN 201611034305 A CN201611034305 A CN 201611034305A CN 107240377 B CN107240377 B CN 107240377B
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panel driving
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pixel
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CN107240377A (en
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李嘉航
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

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  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract

The invention discloses a method and a device for compensating visual angle chromatic aberration of a liquid crystal display and the liquid crystal display, wherein the method comprises the following steps: receiving an input image, acquiring a high pixel voltage of a liquid crystal pixel corresponding to one frame of image in a backlight area, acquiring a low pixel voltage of a liquid crystal pixel corresponding to another adjacent frame of image in the backlight area, and looking up a table for the high pixel voltage and the low pixel voltage to respectively obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal; calculating a brightness compensation signal required by the backlight module in the backlight area according to the high-voltage panel driving signal, the low-voltage panel driving signal and a given reference brightness signal; and performing visual angle color difference compensation on the subsequent frame image according to the brightness compensation signal. The technical scheme of the invention reduces the visual angle chromatic aberration, improves the panel transmittance and reduces the cost of the backlight module.

Description

Method and device for compensating visual angle chromatic aberration of liquid crystal display and liquid crystal display
Technical Field
The invention relates to the technical field of liquid crystal panel display, in particular to a method and a device for compensating visual angle chromatic aberration of a liquid crystal display and the liquid crystal display.
Background
Most of the existing large-size liquid crystal display panels adopt a negative type VA liquid crystal or IPS liquid crystal technology, the VA liquid crystal technology has the advantages of higher production efficiency and low manufacturing cost compared with the IPS liquid crystal technology, but the VA liquid crystal technology has obvious optical property defects compared with the IPS liquid crystal technology in optical property, particularly the large-size panel needs a larger viewing angle in commercial application, and the VA liquid crystal driving often cannot meet the market application requirements in viewing angle color shift, so that the popularization of the VA liquid crystal technology is influenced.
The general VA-type liquid crystal technology solves the problem of viewing angle color shift by subdividing each primary color of RGB into primary and secondary pixels, and applying different driving voltages to the primary and secondary pixels spatially to solve the problem of viewing angle color shift.
Disclosure of Invention
The invention mainly aims to provide a method for compensating the viewing angle chromatic aberration of a liquid crystal display, aiming at reducing the viewing angle chromatic aberration, improving the panel penetration rate and reducing the cost of a backlight module.
In order to achieve the above object, the present invention provides a method for compensating viewing angle color difference of a liquid crystal display, comprising the following steps;
receiving an input image, acquiring a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table for the high pixel voltage and the low pixel voltage to respectively obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal;
calculating a brightness compensation signal required by the backlight module in the backlight area according to the high-voltage panel driving signal, the low-voltage panel driving signal and a given reference brightness signal;
and performing visual angle color difference compensation on the subsequent frame image according to the brightness compensation signal.
In an embodiment, after the step of "receiving an input image, obtaining a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table for the high pixel voltage and the low pixel voltage to obtain a corresponding high voltage panel driving signal and a corresponding low voltage panel driving signal", respectively, the step of "calculating a luminance compensation signal required by a backlight module in the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal, and a given reference luminance signal" further includes the steps of:
and judging whether the backlight brightness compensation is needed or not according to the high-voltage panel driving signal and the low-voltage panel driving signal.
In an embodiment, when the backlight module uses a white backlight source, the step of "receiving an input image, obtaining a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table for the high pixel voltage and the low pixel voltage to obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal" includes:
receiving two adjacent frames of images, and acquiring high pixel voltage and low pixel voltage of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage, and obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage.
In one embodiment, the first primary color is a G primary color.
In one embodiment, the step of calculating the brightness compensation signal required by the backlight module in the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal and the given reference brightness signal includes:
substituting the related parameters into the following formula to calculate the required brightness compensation signal;
An_L*GTH+An_L*GTL＝An_LL*GTH+An_LH*GTL；
An_L*G’TH+An_L*G’TL＝An_LL*G’TH+An_LH*G’TL；
where An _ L is the reference luminance signal, GTH、GTLA high voltage panel drive signal and a low voltage panel drive signal, G ', corresponding to the high pixel voltage'TH、G’TLA high voltage panel driving signal and a low voltage panel driving signal corresponding to the low pixel voltage, An _ LLAnd An _ LHRespectively, the luminance compensation signals that need to be calculated.
In one embodiment, the step of determining whether the backlight brightness compensation is required according to the high voltage panel driving signal and the low voltage panel driving signal comprises:
making a difference between a high-voltage panel driving signal corresponding to the high pixel voltage and a low-voltage panel driving signal; if the difference value after the difference is within the preset range, the backlight brightness compensation is not carried out; and if the difference value after the difference is made exceeds a preset range, performing backlight brightness compensation.
In an embodiment, when the backlight module uses a three-primary-color backlight source, the step of "receiving an input image, obtaining a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table for the high pixel voltage and the low pixel voltage to obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal" includes:
receiving two adjacent frames of images, and respectively obtaining high pixel voltage and low pixel voltage of a first primary color, a second primary color and a third primary color of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage, respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage of the first primary color, the second primary color and the third primary color, and respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage of the first primary color, the second primary color and the third primary color.
In one embodiment, the step of calculating the brightness compensation signal required by the backlight module in the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal and the given reference brightness signal includes:
substituting the related parameters into the following formula to calculate the required brightness compensation signal;
An_LR*RTH+An_LR*RTL＝An_LRL*RTH+An_LRH*RTL；
An_LG*GTH+An_LG*GTL＝An_LGL*GTH+An_LGH*GTL；
An_LB*BTH+An_LB*BTL＝An_LBL*BTH+An_LBH*BTL；
An_LR*R’TH+An_LR*R’TL＝An_LRL*R’TH+An_LRH*R’TL；
An_LG*G’TH+An_LG*G’TL＝An_LGL*G’TH+An_LGH*G’TL；
An_LB*B’TH+An_LB*B’TL＝An_LBL*B’TH+An_LBH*B’TL；
wherein An _ LR、An_LG、An_LBA first reference luminance signal, a second reference luminance signal and a third reference luminance signal, respectively;
RTH、RTLa high voltage panel driving signal and a low voltage panel driving signal R 'corresponding to a high pixel voltage of the first primary color'TH、R’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a first primary color;
GTH、GTLhigh voltage panel driving signal and low voltage panel driving signal, G ', corresponding to high pixel voltage of second primary color'TH、G’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a second primary color;
BTH、BTLhigh voltage panel driving signal and low voltage panel driving signal, B ', corresponding to high pixel voltage of third primary color'TH、B’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a third primary color;
An_LRL、An_LRH、An_LGL、An_LGH、An_LBLand An _ LBHRespectively, the luminance compensation signals that need to be calculated.
The invention provides a visual angle chromatic aberration compensation device of a liquid crystal display, which comprises:
a signal acquisition module: receiving an input image, acquiring a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table for the high pixel voltage and the low pixel voltage to respectively obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal;
a calculation module: calculating brightness compensation signals required by the backlight module of the backlight area corresponding to two sensors with different high and low voltages according to the high-voltage panel driving signal, the low-voltage panel driving signal and a given reference brightness signal;
the backlight compensation module: and performing color difference compensation on the subsequent frame image according to the brightness compensation signal.
In an embodiment, the apparatus for compensating for viewing angle color difference of a liquid crystal display further includes:
a judging module: and the high-voltage panel driving signal and the low-voltage panel driving signal judge whether backlight brightness compensation is needed or not.
In one embodiment, when the backlight module employs a white backlight source,
the signal acquisition module receives two adjacent frames of images and acquires the high pixel voltage and the low pixel voltage of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage, and obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage.
In one embodiment, the first primary color is a G primary color.
In one embodiment, the calculation module substitutes the relevant parameters into the following formula to calculate the required brightness compensation signal;
An_L*GTH+An_L*GTL＝An_LL*GTH+An_LH*GTL；
An_L*G’TH+An_L*G’TL＝An_LL*G’TH+An_LH*G’TL；
where An _ L is the reference luminance signal, GTH、GTLA high voltage panel drive signal and a low voltage panel drive signal, G ', corresponding to the high pixel voltage'TH、G’TLA high voltage panel driving signal and a low voltage panel driving signal corresponding to the low pixel voltage, An _ LLAnd An _ LHRespectively, the luminance compensation signals that need to be calculated.
In one embodiment, the determining module performs a difference between a high voltage panel driving signal corresponding to a high pixel voltage and a low voltage panel driving signal; if the difference value after the difference is within the preset range, the backlight brightness compensation is not carried out; and if the difference value after the difference is made exceeds a preset range, performing backlight brightness compensation.
In one embodiment, when the backlight module adopts a three-primary-color backlight source, the signal acquisition module receives two adjacent frames of images and respectively acquires high pixel voltage and low pixel voltage of a first primary color, a second primary color and a third primary color of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage, respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage of the first primary color, the second primary color and the third primary color, and respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage of the first primary color, the second primary color and the third primary color.
In one embodiment, the calculation module substitutes the relevant parameters into the following formula to calculate the required brightness compensation signal;
An_LR*RTH+An_LR*RTL＝An_LRL*RTH+An_LRH*RTL；
An_LG*GTH+An_LG*GTL＝An_LGL*GTH+An_LGH*GTL；
An_LB*BTH+An_LB*BTL＝An_LBL*BTH+An_LBH*BTL；
An_LR*R’TH+An_LR*R’TL＝An_LRL*R’TH+An_LRH*R’TL；
An_LG*G’TH+An_LG*G’TL＝An_LGL*G’TH+An_LGH*G’TL；
An_LB*B’TH+An_LB*B’TL＝An_LBL*B’TH+An_LBH*B’TL；
wherein An _ LR、An_LG、An_LBA first reference luminance signal, a second reference luminance signal and a third reference luminance signal, respectively;
RTH、RTLa high voltage panel driving signal and a low voltage panel driving signal R 'corresponding to a high pixel voltage of the first primary color'TH、R’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a first primary color;
GTH、GTLhigh voltage panel driving signal and low voltage panel driving signal, G ', corresponding to high pixel voltage of second primary color'TH、G’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a second primary color;
BTH、BTLhigh voltage panel driving signal and low voltage panel driving signal, B ', corresponding to high pixel voltage of third primary color'TH、B’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a third primary color;
An_LRL、An_LRH、An_LGL、An_LGH、An_LBLand An _ LBHRespectively, the luminance compensation signals that need to be calculated.
The invention also provides a liquid crystal display which comprises the liquid crystal display viewing angle chromatic aberration compensation device.
The invention obtains the high pixel voltage and the low pixel voltage of each liquid crystal pixel in two adjacent frames of images by receiving the input image, respectively obtains the corresponding high voltage panel driving signal and the low voltage panel driving signal by looking up the table for the high pixel voltage and the low pixel voltage, obtains the brightness compensation signal by calculation through the high voltage panel driving signal, the low voltage panel driving signal and the given reference brightness signal, and then inputs the brightness compensation signal to the area corresponding to the backlight module to realize the compensation for the parallax error of the viewing angle. According to the technical scheme, the primary and secondary pixels do not need to be arranged on the panel, so that metal wiring and a thin film transistor element do not need to be designed to drive the secondary pixels, the production process is simplified, the cost is reduced, and meanwhile, the penetration rate of the panel is improved due to the fact that the secondary pixels are removed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for compensating for viewing angle color difference of an LCD according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for compensating for viewing angle color difference of an LCD according to a further embodiment of the present invention;
FIG. 3 is a detailed flowchart of one embodiment of step S100 in FIG. 2;
FIG. 4 is a detailed flowchart of another embodiment of step S100 in FIG. 2;
FIG. 5 is a functional block diagram of an embodiment of a device for compensating viewing angle color difference of a liquid crystal display according to the present invention;
FIG. 6 is a functional block diagram of a further embodiment of the apparatus for compensating viewing angle color difference of an LCD according to the present invention.
The reference numbers illustrate:
Figure BDA0001155424920000061
Figure BDA0001155424920000071
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a method for compensating visual angle chromatic aberration of a liquid crystal display.
Referring to fig. 1, in an embodiment of the present invention, the method for compensating for viewing angle chromatic aberration of a liquid crystal display includes the following steps:
s100, receiving an input image, acquiring a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table for the high pixel voltage and the low pixel voltage to respectively obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal;
s200, calculating a brightness compensation signal required by the backlight module in the backlight area according to the high-voltage panel driving signal, the low-voltage panel driving signal and a given reference brightness signal;
and S300, performing visual angle color difference compensation on the subsequent frame image according to the brightness compensation signal.
The video signal includes a voltage signal of the liquid crystal pixel, that is, a high pixel voltage and a low pixel voltage of the liquid crystal pixel. In general, the liquid crystal display panel driving signal is sequentially driven by high and low voltage signals along with the image frame. High voltage panel drive signal RH/GH/BHAnd low voltage surfacePlate drive signal RL/GL/BLGenerally, L UT (L ook Up Table) is recorded in a hardware buffer, each R/G/B input signal is 0-255 corresponding to 256 high-low voltage signals in total, and each R/G/B input signal is seen by 8bit driving signals, and 3-256 pairs of high-voltage signals R are providedH/GH/BHAnd a low voltage signal RL/GL/BL。
In the liquid crystal display, the display effect of the liquid crystal is determined by the common driving of the panel driving signal and the luminance signal of the backlight source.
In this embodiment, the required brightness compensation signal is calculated according to the high-voltage panel driving signal, the low-voltage panel driving signal, and the given reference brightness signal, so that the display effect of the liquid crystal display under the coordination of the reference brightness signal, the high-voltage panel driving signal, and the low-voltage panel driving signal is consistent with the display effect under the joint coordination driving of the brightness compensation signal, the high-voltage panel driving signal, and the low-voltage panel driving signal.
The invention obtains the high pixel voltage and the low pixel voltage of each liquid crystal pixel in two adjacent frames of images by receiving the input image, respectively obtains the corresponding high voltage panel driving signal and the low voltage panel driving signal by looking up the table for the high pixel voltage and the low pixel voltage, obtains the brightness compensation signal by calculation through the high voltage panel driving signal, the low voltage panel driving signal and the given reference brightness signal, and then inputs the brightness compensation signal to the area corresponding to the backlight module to realize the compensation for the parallax error of the viewing angle. According to the technical scheme, the primary and secondary pixels do not need to be arranged on the panel, so that metal wiring and a thin film transistor element do not need to be designed to drive the secondary pixels, the production process is simplified, the cost is reduced, and meanwhile, the penetration rate of the panel is improved due to the fact that the secondary pixels are removed.
Referring to fig. 2, further, after the step of "receiving an input image and acquiring a panel driving signal of an image corresponding to a backlight area", and before the step of "calculating a luminance compensation signal required by a backlight module of the backlight area according to the panel driving signal and a given reference luminance signal", the method further includes the steps of:
and S200, judging whether backlight brightness compensation is needed or not according to the driving signal of the top panel.
When the backlight brightness compensation is carried out, because the driving of the backlight signal which is easily perceived by the human eye residual light is frequently carried out for adjusting the backlight brightness, in order to reduce the defect of the backlight modulation, the phenomenon of discomfort of the human eye is reduced by judging whether the backlight brightness compensation is needed or not and only carrying out the backlight brightness compensation when the compensation is needed.
The present invention includes the following embodiments according to the type of backlight source used by the backlight module.
In an embodiment, referring to fig. 3, when the backlight module uses a white backlight, the step "receiving an input image, obtaining a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, looking up a table of the high pixel voltage and the low pixel voltage to obtain a corresponding high-voltage panel driving signal and a corresponding low-voltage panel driving signal" includes:
s110a, receiving two adjacent frames of images, and acquiring a high pixel voltage and a low pixel voltage of a first primary color of each liquid crystal pixel;
s120a, looking up the high pixel voltage and the low pixel voltage, obtaining a high voltage panel driving signal and a low voltage panel driving signal corresponding to the high pixel voltage, and obtaining a high voltage panel driving signal and a low voltage panel driving signal corresponding to the low pixel voltage.
In the area of the backlight module, there are a high pixel voltage and a low pixel voltage (distinguished from signal amplitude) according to the input frame image. After obtaining the high pixel voltage and the low pixel voltage, obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage through a table look-up operation, and obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage.
In this embodiment, the first primary color is a G primary color. Because the white light source only needs one path of brightness signal for adjustment, the brightness of the G primary color is more obvious than that of the R/B primary color and the flicker degree is more acute for human eyes, and therefore the brightness compensation signal is calculated by adopting the high pixel voltage and the low pixel voltage of the G-based corresponding color panel driving signal.
Specifically, the step of calculating a luminance compensation signal required by the backlight module in the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal and a given reference luminance signal includes:
substituting the related parameters into the following formula to calculate the required brightness compensation signal;
An_L*GTH+An_L*GTL＝An_LL*GTH+An_LH*GTL；
An_L*G’TH+An_L*G’TL＝An_LL*G’TH+An_LH*G’TL；
where An _ L is the reference luminance signal, GTH、GTLA high voltage panel drive signal and a low voltage panel drive signal, G ', corresponding to the high pixel voltage'TH、G’TLA high voltage panel driving signal and a low voltage panel driving signal corresponding to the low pixel voltage, An _ LLAnd An _ LHRespectively, the luminance compensation signals that need to be calculated.
It should be noted that in this embodiment, two frames of images with adjacent time sequences are obtained, and the first frame of image corresponds to the high-voltage panel driving signal RTH/GTH/BTHThe second frame image corresponds to the low voltage panel driving signal RTL/GTL/BTLLuminance signal a1_ L of the backlight of the corresponding region of the first frame imageL、A2_LL、A3_LL……An_LLWhere N is 1,2, 3 …, and N is the area of independently controllable light source defined by direct-type backlight, and the brightness signal A1_ L of the backlight in the corresponding area of the second frame imageH、A2_LH、A3_LH……An_LHWherein n is 1,2,3, …, N, N are independently controllable light source blocks defined by direct-type backlight, wherein the backlight brightness signal An _ LL/An_LHThe following conditions are satisfied:
An_LL＜An_L＜An_LH……(1-1)
the high-low panel voltage driving signal required by the high pixel voltage G look-up table viewing angle compensation is GTHAnd GTLThe high and low panel voltage driving signals are used for calculating the brightness signals An _ L of the corresponding areas of the first frame image and the second frame imageL/An_LHAccording to the following requirements are met:
GTH*An_L+GTL*An_L＝GTH*An_LL+GTL*An_LH.......(1-2)
the high and low signals required by the low pixel voltage G 'for viewing angle compensation in table look-up are G'THAnd G'TLAlso used for calculating the brightness signals An _ L of the first frame image and the second frame imageL/An_LHThe brightness satisfies the following requirements:
G’TH*An_L+G’TL*An_L＝G’TH*An_LL+G’TL*An_LH……(1-3).
the compensation signal An _ L calculated according to the equations (1-2) and (1-3)L/An_LHAnd performing backlight brightness compensation when the next frame of image is input.
Further, the step of determining whether the backlight brightness compensation is required according to the panel-most driving signal includes:
the difference between the high-voltage panel driving signal corresponding to the high pixel voltage and the low-voltage panel driving signal is calculated; if the difference value after the difference is within the preset range, the backlight brightness compensation is not carried out; and if the difference value after the difference is made exceeds a preset range, performing backlight brightness compensation.
The embodiment passes the judgment formula GTH-GTL<And X … … (1-4), wherein X is a critical condition for compensating the backlight brightness, and when the signal voltage difference is not more than X, the backlight brightness compensation is not carried out.
In another embodiment, referring to fig. 4, when the backlight module employs a three-primary-color backlight source, the step "receiving an input image and acquiring a panel driving signal corresponding to a backlight area" includes:
s110b, receiving two adjacent frames of images, and respectively obtaining high pixel voltage and low pixel voltage of a first primary color, a second primary color and a third primary color of each liquid crystal pixel;
s120b, looking up the high pixel voltage and the low pixel voltage, respectively obtaining a high voltage panel driving signal and a low voltage panel driving signal corresponding to the high pixel voltage of the first primary color, the second primary color, and the third primary color, and respectively obtaining a high voltage panel driving signal and a low voltage panel driving signal corresponding to the low pixel voltage of the first primary color, the second primary color, and the third primary color.
Specifically, the step of calculating a luminance compensation signal required by the backlight module of the backlight area according to the panel driving signal and a given reference luminance signal includes:
substituting the related parameters into the following formula to calculate the required brightness compensation signal;
An_LR*RTH+An_LR*RTL＝An_LRL*RTH+An_LRH*RTL；
An_LG*GTH+An_LG*GTL＝An_LGL*GTH+An_LGH*GTL；
An_LB*BTH+An_LB*BTL＝An_LBL*BTH+An_LBH*BTL；
An_LR*R’TH+An_LR*R’TL＝An_LRL*R’TH+An_LRH*R’TL；
An_LG*G’TH+An_LG*G’TL＝An_LGL*G’TH+An_LGH*G’TL；
An_LB*B’TH+An_LB*B’TL＝An_LBL*B’TH+An_LBH*B’TL；
wherein An _ LR、An_LG、An_LBA first reference luminance signal, a second reference luminance signal and a third reference luminance signal, respectively;
RTH、RTLa high voltage panel driving signal and a low voltage panel driving signal R 'corresponding to a high pixel voltage of the first primary color'TH、R’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a first primary color;
GTH、GTLhigh voltage panel driving signal and low voltage panel driving signal, G ', corresponding to high pixel voltage of second primary color'TH、G’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a second primary color;
BTH、BTLhigh voltage panel driving signal and low voltage panel driving signal, B ', corresponding to high pixel voltage of third primary color'TH、B’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a third primary color;
An_LRL、An_LRH、An_LGL、An_LGH、An_LBLand An _ LBHRespectively, the luminance compensation signals that need to be calculated.
It should be noted that, in this embodiment, two frames of images with adjacent acquisition time sequences are adopted, and the first frame of image corresponds to the high-voltage panel driving corresponding signal RTH/GTH/BTH(ii) a The second frame image corresponds to the low voltage panel driving signal RTL/GTL/BTLThe backlight adopts a direct type partition design, each area respectively represents A1, A2, A3 and … An, each block light source is combined by RGB three-color light sources, the area A1 is formed by combining three-color light sources of A1R, A1G and A1B, the area A2 is formed by combining three-color light sources of A2R, A2G and A2B, the area An is formed by combining three-color light sources of AnR, AnG and AnB, and the first frame image area An corresponds to a brightness signal An _ L of the backlightRL、An_LGL、An_LBLThe backlight brightness signal An _ L corresponding to the second frame image block AnRH、An_LGH、An_LBHThe first frame image/the second frame image of the block n corresponds to the backlight luminance signal An _ LRL/An_LRH、An_LGL/An_LGH、An_LBL/An_LBHThe following conditions were used:
An_LRL＜An_LR＜An_LRH……(2-1)
An_LGL＜An_LG＜An_LGH……(3-1)
An_LBL＜An_LB＜An_LBH……(4-1)
wherein, An _ LR、An_LGAnd An _ LBRespectively, a given first reference luminance signal, a given second reference luminance signal, and a given third reference luminance signal. The high pixel voltage R, G, B in block n is obtained by looking up the table to obtain the high voltage panel driving signal RTH、GTH、BTHAnd a low voltage panel driving signal RTL、GTL、BTLSatisfy the following requirements
RTH*An_LR+RTL*An_LR＝RTH*An_LRL+RTL*An_LRH……(2-2)
GTH*An_LG+GTL*An_LG＝GTH*An_LGL+GTL*An_LGH……(3-2)
BTH*An_LB+BTL*An_LB＝BTH*An_LBL+BTL*An_LBH……(4-2)
Similarly, the low pixel voltages R ', G ', B ' are used to obtain the high voltage panel driving signal R ' by looking up the table 'TH、G’TH、B’THAnd a low voltage panel drive signal R'TL、G’TL、B’TLThe following requirements are met:
R’TH*An_LR+R’TL*An_LR＝R’TH*An_LRL+R’TL*An_LRH……(2-3)
G’TH*An_LG+G’TL*An_LG＝G’TH*An_LGL+G’TL*An_LGH……(3-3)
B’TH*An_LB+B’TL*An_LB＝B’TH*An_LBL+B’TL*An_LBH……(4-3)
substituting into the related parameters, and calculating the brightness compensation signal An _ L required by the three primary color backlight source according to the above formulas 2-2, 2-3, 3-2, 3-3, 4-2, and 4-3RL、An_LRH、An_LGL、An_LGH、An_LBLAnd An _ LBH。
Further, whether brightness compensation is needed or not is judged according to a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage.
By judging the formula RTH-RTL<X……(2-4)
GTH-GTL<Y……(3-4)
BTH-BTL<Z……(4-4)
To determine whether or not the viewing angle chromatic aberration compensation is required. X, Y, Z, the threshold condition for starting compensation of backlight brightness is that when the voltage difference between the high pixel voltage R, G, B and the corresponding high-low panel driving voltage signal is larger than any one of X, Y, Z, the compensation of backlight brightness is started.
In order to solve the visual angle color cast defect of TN, OCB and VA type TFT display panels, the invention adopts a direct or side backlight, a white light or RGB three-color light source, and matches panel high-low voltage panel driving signals to compensate and adjust the backlight brightness, thereby reducing the flicker phenomenon caused by the switching difference of the panel high-low voltage driving signals. Meanwhile, the advantage of compensating visual angle color cast by high and low liquid crystal voltages can be maintained. Secondly, the pixel is not designed to be a primary pixel and a secondary pixel, so that the penetration rate of the TFT display panel is greatly improved, and the backlight cost is reduced. For the development of high resolution TFT display panel, the pixel design without primary and secondary pixel design has more remarkable effect on transmittance and resolution enhancement.
Referring to fig. 5, the present invention provides a viewing angle color difference compensation device for a liquid crystal display, which may be a television, a computer, etc. The device for compensating the visual angle chromatic aberration of the liquid crystal display comprises:
the signal acquisition module 10: receiving input images, obtaining high pixel voltage and low pixel voltage of each liquid crystal pixel in two adjacent frames of images, looking up the table of the high pixel voltage and the low pixel voltage to respectively obtain corresponding high-voltage panel driving signals and low-voltage panel driving signals
The calculation module 30: calculating brightness compensation signals required by the backlight module of the backlight area corresponding to two sensors with different high and low voltages according to the high-voltage panel driving signal, the low-voltage panel driving signal and a given reference brightness signal;
backlight compensation module 40: and performing color difference compensation on the subsequent frame image according to the brightness compensation signal.
Referring to fig. 6, further, the device for compensating viewing angle color difference of a liquid crystal display further includes:
the judging module 20: judging whether backlight brightness compensation is needed or not according to the high-voltage panel driving signal and the low-voltage panel driving signal;
specifically, when the backlight module adopts a white backlight source, the signal obtaining module 10 receives an input image, and obtains a high pixel voltage and a low pixel voltage of a first primary color in a backlight area;
and looking up the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage, and obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage.
Further, the first primary color is a G primary color.
Specifically, the calculating module 30 substitutes the relevant parameters into the following formula to calculate the required brightness compensation signal;
An_L*GTH+An_L*GTL＝An_LL*GTH+An_LH*GTL；
An_L*G’TH+An_L*G’TL＝An_LL*G’TH+An_LH*G’TL；
where An _ L is the reference luminance signal, GTH、GTLA high voltage panel drive signal and a low voltage panel drive signal, G ', corresponding to the high pixel voltage'TH、G’TLA high voltage panel driving signal and a low voltage panel driving signal corresponding to the low pixel voltage, An _ LLAnd An _ LHRespectively, the luminance compensation signals that need to be calculated.
Specifically, the determining module 20 performs a difference between a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage; if the difference value after the difference is within the preset range, the backlight brightness compensation is not carried out; and if the difference value after the difference is made exceeds a preset range, performing backlight brightness compensation.
Specifically, when the backlight module adopts a three-primary-color backlight source, the signal obtaining module 10
Receiving two adjacent frames of images, and respectively obtaining high pixel voltage and low pixel voltage of a first primary color, a second primary color and a third primary color of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage, respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage of the first primary color, the second primary color and the third primary color, and respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage of the first primary color, the second primary color and the third primary color.
Specifically, the calculating module 30 substitutes the relevant parameters into the following formula to calculate the required brightness compensation signal;
An_LR*RTH+An_LR*RTL＝An_LRL*RTH+An_LRH*RTL；
An_LG*GTH+An_LG*GTL＝An_LGL*GTH+An_LGH*GTL；
An_LB*BTH+An_LB*BTL＝An_LBL*BTH+An_LBH*BTL；
An_LR*R’TH+An_LR*R’TL＝An_LRL*R’TH+An_LRH*R’TL；
An_LG*G’TH+An_LG*G’TL＝An_LGL*G’TH+An_LGH*G’TL；
An_LB*B’TH+An_LB*B’TL＝An_LBL*B’TH+An_LBH*B’TL；
wherein An _ LR、An_LG、An_LBA first reference luminance signal, a second reference luminance signal and a third reference luminance signal, respectively;
RTH、RTLa high voltage panel driving signal and a low voltage panel driving signal R 'corresponding to a high pixel voltage of the first primary color'TH、R’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a first primary color;
GTH、GTLhigh voltage panel driving signal and low voltage panel driving signal, G ', corresponding to high pixel voltage of second primary color'TH、G’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a second primary color;
BTH、BTLhigh voltage panel driving signal and low voltage panel driving signal, B ', corresponding to high pixel voltage of third primary color'TH、B’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a third primary color;
An_LRL、An_LRH、An_LGL、An_LGH、An_LBLand An _ LBHRespectively, the luminance compensation signals that need to be calculated.
The present invention further provides a liquid crystal display, which includes the above liquid crystal display viewing angle color difference compensation apparatus, and the specific structure of the liquid crystal display viewing angle color difference compensation apparatus refers to the above embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (17)

1. A method for compensating visual angle chromatic aberration of a liquid crystal display is characterized by comprising the following steps;
receiving an input image, acquiring a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table of the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal of the high pixel voltage and a high-voltage panel driving signal and a low-voltage panel driving signal of the low pixel voltage;
calculating brightness compensation signals required by the backlight module of the backlight area corresponding to different high-low voltage panel driving signals according to the high-voltage panel driving signal, the low-voltage panel driving signal and the given reference brightness signal corresponding to each pixel corresponding to the two adjacent frames of images;
and performing visual angle color difference compensation on the subsequent frame image according to the brightness compensation signal.
2. The method as claimed in claim 1, wherein after the steps of receiving the input image, obtaining the high pixel voltage and the low pixel voltage of each liquid crystal pixel in two adjacent frames of images, looking up the table for the high pixel voltage and the low pixel voltage to obtain the high voltage panel driving signal and the low voltage panel driving signal of the high pixel voltage and the high voltage panel driving signal and the low voltage panel driving signal of the low pixel voltage, the step of calculating the luminance compensation signals required by the backlight module corresponding to different high and low voltage panel driving signals in the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal and the given reference luminance signal corresponding to the two adjacent frames of images further comprises the steps of:
and judging whether the backlight brightness compensation is needed or not according to the high-voltage panel driving signal and the low-voltage panel driving signal obtained by looking up the table.
3. The method for compensating for the viewing angle color difference of the liquid crystal display as claimed in claim 2, wherein when the backlight module employs a white backlight source, the step of receiving the input image, obtaining the high pixel voltage and the low pixel voltage of each liquid crystal pixel in two adjacent frames of images, looking up the table for the high pixel voltage and the low pixel voltage to obtain the high voltage panel driving signal and the low voltage panel driving signal of the high pixel voltage and the high voltage panel driving signal and the low voltage panel driving signal of the low pixel voltage comprises:
receiving two adjacent frames of images, and acquiring high pixel voltage and low pixel voltage of a first primary color of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage, and obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage.
4. The method for compensating for viewing angle chromatic aberration of a liquid crystal display of claim 3, wherein the first primary color is a G primary color.
5. The method as claimed in claim 4, wherein the step of calculating the brightness compensation signals required for different high and low voltage panel driving signals in the backlight module of the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal and the given reference brightness signal of each pixel corresponding to the two adjacent frames of images comprises:
substituting the related parameters into the following formula to calculate the required brightness compensation signal;
An_L*GTH+An_L*GTL＝An_LL*GTH+An_LH*GTL；
An_L*G’TH+An_L*G’TL＝An_LL*G’TH+An_LH*G’TL；
where An _ L is the reference luminance signal, GTH、GTLA high voltage panel drive signal and a low voltage panel drive signal, G ', corresponding to a high pixel voltage of each pixel corresponding to the two adjacent frames of images'TH、G’TLA high voltage panel driving signal and a low voltage panel driving signal corresponding to a low pixel voltage of each pixel corresponding to the two adjacent frames of images, An _ LLAnd An _ LHThe brightness compensation signals are needed by the backlight module corresponding to different high-low voltage panel driving signals in the backlight area.
6. The method as claimed in claim 3, wherein the step of determining whether the backlight brightness compensation is required according to the high voltage panel driving signal and the low voltage panel driving signal obtained by looking up the table comprises:
the high-voltage panel driving signal and the low-voltage panel driving signal corresponding to the high pixel voltage of each pixel corresponding to the two adjacent frames of images are subjected to difference; if the difference value after the difference is within the preset range, the backlight brightness compensation is not carried out; and if the difference value after the difference is made exceeds a preset range, performing backlight brightness compensation.
7. The method for compensating for the viewing angle color difference of the liquid crystal display as claimed in claim 2, wherein when the backlight module employs a three-primary-color backlight, the step of receiving the input image, obtaining the high pixel voltage and the low pixel voltage of each liquid crystal pixel in two adjacent frames of images, looking up the table for the high pixel voltage and the low pixel voltage to obtain the high-voltage panel driving signal and the low-voltage panel driving signal of the high pixel voltage and the high-voltage panel driving signal and the low-voltage panel driving signal of the low pixel voltage comprises:
receiving two adjacent frames of images, wherein each liquid crystal pixel has a high pixel voltage and a low pixel voltage of a first primary color and a second primary color, namely a third primary color;
and looking up the high pixel voltage and the low pixel voltage, respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage of the first primary color, the second primary color and the third primary color, and respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage of the first primary color, the second primary color and the third primary color.
8. The method as claimed in claim 7, wherein the step of calculating the brightness compensation signals required for different high and low voltage panel driving signals in the backlight module of the backlight area according to the high voltage panel driving signal, the low voltage panel driving signal and the given reference brightness signal corresponding to the two adjacent frames of images comprises:
substituting the related parameters into the following formula to calculate the required brightness compensation signal;
An_LR*RTH+An_LR*RTL＝An_LRL*RTH+An_LRH*RTL；
An_LG*GTH+An_LG*GTL＝An_LGL*GTH+An_LGH*GTL；
An_LB*BTH+An_LB*BTL＝An_LBL*BTH+An_LBH*BTL；
An_LR*R’TH+An_LR*R’TL＝An_LRL*R’TH+An_LRH*R’TL；
An_LG*G’TH+An_LG*G’TL＝An_LGL*G’TH+An_LGH*G’TL；
An_LB*B’TH+An_LB*B’TL＝An_LBL*B’TH+An_LBH*B’TL；
wherein An _ LR、An_LG、An_LBA first reference luminance signal, a second reference luminance signal and a third reference luminance signal, respectively;
RTH、RTLa high voltage panel driving signal and a low voltage panel driving signal R 'corresponding to the high pixel voltage of the first primary color of each pixel corresponding to the two adjacent frames of images'TH、R’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a first primary color of each pixel corresponding to the two adjacent frames of images;
GTH、GTLa high voltage panel driving signal and a low voltage panel driving signal, G ', corresponding to the high pixel voltage of the second primary color of each pixel corresponding to the two adjacent frames of images'TH、G’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to the low pixel voltage of the second primary color of each pixel corresponding to the two adjacent frames of images;
BTH、BTLa high voltage panel driving signal and a low voltage panel driving signal, B ', corresponding to a high pixel voltage of a third primary color of each pixel corresponding to the two adjacent frames of images'TH、B’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to the low pixel voltage of the third primary color of each pixel corresponding to the two adjacent frames of images;
An_LRL、An_LRH、An_LGL、An_LGH、An_LBLand An _ LBHRespectively for the luminance compensation signals to be calculatedNumber (n).
9. A device for compensating viewing angle chromatic aberration of a liquid crystal display comprises:
a signal acquisition module: receiving an input image, acquiring a high pixel voltage and a low pixel voltage of each liquid crystal pixel in two adjacent frames of images, and looking up a table of the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal of the high pixel voltage and a high-voltage panel driving signal and a low-voltage panel driving signal of the low pixel voltage;
a calculation module: calculating brightness compensation signals required by the backlight module of the backlight area corresponding to different high-low voltage panel driving signals according to the high-voltage panel driving signal, the low-voltage panel driving signal and a given reference brightness signal of each pixel corresponding to the two adjacent frames of images;
the backlight compensation module: and performing color difference compensation on the subsequent frame image according to the brightness compensation signal.
10. The apparatus for compensating for viewing angle color difference of liquid crystal display of claim 9, further comprising:
a judging module: and judging whether backlight brightness compensation is needed or not according to the high-voltage panel driving signal and the low-voltage panel driving signal obtained by looking up the table.
11. The device for compensating viewing angle color difference of liquid crystal display according to claim 10, wherein when the backlight module employs a white backlight source,
the signal acquisition module receives two adjacent frames of images and acquires high pixel voltage and low pixel voltage of a first primary color of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage to obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage, and obtain a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage.
12. The apparatus for compensating viewing angle chromatic aberration of a liquid crystal display of claim 11, wherein the first primary color is a G primary color.
13. The apparatus of claim 12, wherein the calculating module calculates the required luminance compensation signal by substituting the relevant parameters into the following formula;
An_L*GTH+An_L*GTL＝An_LL*GTH+An_LH*GTL；
An_L*G’TH+An_L*G’TL＝An_LL*G’TH+An_LH*G’TL；
where An _ L is the reference luminance signal, GTH、GTLA high voltage panel drive signal and a low voltage panel drive signal, G ', corresponding to a high pixel voltage of each pixel corresponding to the two adjacent frames of images'TH、G’TLA high voltage panel driving signal and a low voltage panel driving signal corresponding to a low pixel voltage of each pixel corresponding to the two adjacent frames of images, An _ LLAnd An _ LHThe brightness compensation signals are needed by the backlight module corresponding to different high-low voltage panel driving signals in the backlight area.
14. The apparatus of claim 11, wherein the determining module differentiates between a high voltage panel driving signal and a low voltage panel driving signal corresponding to a high pixel voltage of each pixel corresponding to two adjacent frames of images; if the difference value after the difference is within the preset range, the backlight brightness compensation is not carried out; and if the difference value after the difference is made exceeds a preset range, performing backlight brightness compensation.
15. The device for compensating visual angle chromatic aberration of a liquid crystal display of claim 10, wherein when the backlight module employs a three-primary-color backlight source, the signal obtaining module receives two adjacent frames of images and respectively obtains high pixel voltage and low pixel voltage of a first primary color, a second primary color and a third primary color of each liquid crystal pixel;
and looking up the high pixel voltage and the low pixel voltage, respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the high pixel voltage of the first primary color, the second primary color and the third primary color, and respectively obtaining a high-voltage panel driving signal and a low-voltage panel driving signal corresponding to the low pixel voltage of the first primary color, the second primary color and the third primary color.
16. The apparatus of claim 15, wherein the calculating module substitutes the related parameters into the following formula to calculate the required luminance compensation signal;
An_LR*RTH+An_LR*RTL＝An_LRL*RTH+An_LRH*RTL；
An_LG*GTH+An_LG*GTL＝An_LGL*GTH+An_LGH*GTL；
An_LB*BTH+An_LB*BTL＝An_LBL*BTH+An_LBH*BTL；
An_LR*R’TH+An_LR*R’TL＝An_LRL*R’TH+An_LRH*R’TL；
An_LG*G’TH+An_LG*G’TL＝An_LGL*G’TH+An_LGH*G’TL；
An_LB*B’TH+An_LB*B’TL＝An_LBL*B’TH+An_LBH*B’TL；
wherein An _ LR、An_LG、An_LBRespectively a first reference brightness signal, a second reference brightness signal and a third reference brightnessA degree signal;
RTH、RTLa high voltage panel driving signal and a low voltage panel driving signal R 'corresponding to the high pixel voltage of the first primary color of each pixel corresponding to the two adjacent frames of images'TH、R’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to a low pixel voltage of a first primary color of each pixel corresponding to the two adjacent frames of images;
GTH、GTLa high voltage panel driving signal and a low voltage panel driving signal, G ', corresponding to the high pixel voltage of the second primary color of each pixel corresponding to the two adjacent frames of images'TH、G’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to the low pixel voltage of the second primary color of each pixel corresponding to the two adjacent frames of images;
BTH、BTLa high voltage panel driving signal and a low voltage panel driving signal, B ', corresponding to a high pixel voltage of a third primary color of each pixel corresponding to the two adjacent frames of images'TH、B’TLA high voltage panel drive signal and a low voltage panel drive signal corresponding to the low pixel voltage of the third primary color of each pixel corresponding to the two adjacent frames of images;
An_LRL、An_LRH、An_LGL、An_LGH、An_LBLand An _ LBHRespectively, the luminance compensation signals that need to be calculated.
17. A liquid crystal display comprising the device for compensating viewing angle color difference of a liquid crystal display according to any one of claims 9 to 16.
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